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   <div id="projectname">EquTemper&#160;<span id="projectnumber">1.01</span></div>
   <div id="projectbrief">An equation editor.</div>
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<a href="main_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ========================================================================= */</span>
<a name="l00002"></a>00002 <span class="comment">/* ------------------------------------------------------------------------- */</span><span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment">/*!</span>
<a name="l00004"></a>00004 <span class="comment">  \file         main.h</span>
<a name="l00005"></a>00005 <span class="comment">  \date         Aug 2011</span>
<a name="l00006"></a>00006 <span class="comment">  \author       TNick</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment">  \brief        Contains global definitions for application</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment">  Copyright (c) 2011, Nicu Tofan</span>
<a name="l00012"></a>00012 <span class="comment"> All rights reserved.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> Redistribution and use in source and binary forms, with or without</span>
<a name="l00015"></a>00015 <span class="comment"> modification, are permitted provided that the following conditions are met:</span>
<a name="l00016"></a>00016 <span class="comment">    * Redistributions of source code must retain the above copyright</span>
<a name="l00017"></a>00017 <span class="comment">      notice, this list of conditions and the following disclaimer.</span>
<a name="l00018"></a>00018 <span class="comment">    * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00019"></a>00019 <span class="comment">      notice, this list of conditions and the following disclaimer in the</span>
<a name="l00020"></a>00020 <span class="comment">      documentation and/or other materials provided with the distribution.</span>
<a name="l00021"></a>00021 <span class="comment">    * Neither the name of the copyright holder nor the</span>
<a name="l00022"></a>00022 <span class="comment">      names of its contributors may be used to endorse or promote products</span>
<a name="l00023"></a>00023 <span class="comment">      derived from this software without specific prior written permission.</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS &quot;AS IS&quot; AND</span>
<a name="l00026"></a>00026 <span class="comment"> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00027"></a>00027 <span class="comment"> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</span>
<a name="l00028"></a>00028 <span class="comment"> DISCLAIMED. IN NO EVENT SHALL NICU TOFAN BE LIABLE FOR ANY</span>
<a name="l00029"></a>00029 <span class="comment"> DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span>
<a name="l00030"></a>00030 <span class="comment"> (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span>
<a name="l00031"></a>00031 <span class="comment"> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND</span>
<a name="l00032"></a>00032 <span class="comment"> ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00033"></a>00033 <span class="comment"> (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00034"></a>00034 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00035"></a>00035 <span class="comment"></span>
<a name="l00036"></a>00036 <span class="comment">*/</span>
<a name="l00037"></a>00037 <span class="comment"></span>
<a name="l00038"></a>00038 <span class="comment">/**</span>
<a name="l00039"></a>00039 <span class="comment">    \mainpage   EquTemper source code documentation</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="comment">The project uses Qt to became a platform-independent equation editor.</span>
<a name="l00042"></a>00042 <span class="comment"></span>
<a name="l00043"></a>00043 <span class="comment"></span>
<a name="l00044"></a>00044 <span class="comment">\section documentation Documentation</span>
<a name="l00045"></a>00045 <span class="comment">Source code documentation, that was automatically generated using</span>
<a name="l00046"></a>00046 <span class="comment">&lt;a href=&quot;http://www.doxygen.org&quot;&gt;Doxygen&lt;/a&gt;, is accessible to be</span>
<a name="l00047"></a>00047 <span class="comment">&lt;a href=&quot;https://equtemper.googlecode.com/svn/trunk/doc/html/index.html&quot;&gt;browsed online&lt;/a&gt;.</span>
<a name="l00048"></a>00048 <span class="comment"></span>
<a name="l00049"></a>00049 <span class="comment">&lt;a href=&quot;https://code.google.com&quot;&gt;Google code&lt;/a&gt; also provides the project with</span>
<a name="l00050"></a>00050 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/wiki/MainPage&quot;&gt;a wiki&lt;/a&gt;,</span>
<a name="l00051"></a>00051 <span class="comment">where development guiding lines are lined up.</span>
<a name="l00052"></a>00052 <span class="comment"></span>
<a name="l00053"></a>00053 <span class="comment">User documentation in html format, enhanced with screen captions and</span>
<a name="l00054"></a>00054 <span class="comment">easy-to-read text, shall be placed online, too, as soon as first</span>
<a name="l00055"></a>00055 <span class="comment">version is available for download.</span>
<a name="l00056"></a>00056 <span class="comment"></span>
<a name="l00057"></a>00057 <span class="comment"></span>
<a name="l00058"></a>00058 <span class="comment">\section downloads Downloads</span>
<a name="l00059"></a>00059 <span class="comment">Binary distributions shall be available in</span>
<a name="l00060"></a>00060 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/downloads/list&quot;&gt;dedicated section&lt;/a&gt;.</span>
<a name="l00061"></a>00061 <span class="comment">As indicated in</span>
<a name="l00062"></a>00062 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/wiki/SiteBluePrint&quot;&gt;Site blueprint&lt;/a&gt;,</span>
<a name="l00063"></a>00063 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/downloads/list&quot;&gt;downloads section&lt;/a&gt;</span>
<a name="l00064"></a>00064 <span class="comment">is organised in folders, each having the name of the version that they host.</span>
<a name="l00065"></a>00065 <span class="comment"></span>
<a name="l00066"></a>00066 <span class="comment"></span>
<a name="l00067"></a>00067 <span class="comment">\section src_code Source code</span>
<a name="l00068"></a>00068 <span class="comment">Each version will make it&#39;s source code available as various types of archives.</span>
<a name="l00069"></a>00069 <span class="comment">Also, the repository may be</span>
<a name="l00070"></a>00070 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/source/checkout&quot;&gt;checked out&lt;/a&gt; using</span>
<a name="l00071"></a>00071 <span class="comment">&lt;a href=&quot;http://subversion.tigris.org&quot;&gt;svn&lt;/a&gt; or it may be</span>
<a name="l00072"></a>00072 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/source/browse/#svn%2Ftrunk&quot;&gt;browsed online&lt;/a&gt;.</span>
<a name="l00073"></a>00073 <span class="comment"></span>
<a name="l00074"></a>00074 <span class="comment"></span>
<a name="l00075"></a>00075 <span class="comment">\section user_support Bug reports. Feature requests. Ideas.</span>
<a name="l00076"></a>00076 <span class="comment">To complain about something please use the</span>
<a name="l00077"></a>00077 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/issues/list&quot;&gt;issues section&lt;/a&gt;.</span>
<a name="l00078"></a>00078 <span class="comment">A goggle group or a forum may be set-up later, as needed.</span>
<a name="l00079"></a>00079 <span class="comment"></span>
<a name="l00080"></a>00080 <span class="comment"></span>
<a name="l00081"></a>00081 <span class="comment">\section contrib Contributions</span>
<a name="l00082"></a>00082 <span class="comment">These are highly welcomed. Please browse through</span>
<a name="l00083"></a>00083 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/source/browse/#svn%2Ftrunk&quot;&gt;source code&lt;/a&gt;</span>
<a name="l00084"></a>00084 <span class="comment">to familiarise yourself with it, first, then drop me</span>
<a name="l00085"></a>00085 <span class="comment">&lt;a href=&quot;https://sites.google.com/site/tnickweb/home&quot;&gt;an e-mail&lt;/a&gt;.</span>
<a name="l00086"></a>00086 <span class="comment"></span>
<a name="l00087"></a>00087 <span class="comment">&lt;hr&gt;</span>
<a name="l00088"></a>00088 <span class="comment">Step to \subpage sp_src_idx &quot;an overview of source code&quot; or see the</span>
<a name="l00089"></a>00089 <span class="comment">\subpage future_plans &quot;things that need to be done.&quot;</span>
<a name="l00090"></a>00090 <span class="comment">A separate page for \subpage ddhc_main_page &quot;debugging module&quot; describes it&#39;s</span>
<a name="l00091"></a>00091 <span class="comment">implementation and usage.</span>
<a name="l00092"></a>00092 <span class="comment"></span>
<a name="l00093"></a>00093 <span class="comment"></span>
<a name="l00094"></a>00094 <span class="comment">\page sp_src_idx An overview of source code</span>
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment">This page attempts to give an overview of the source code and to give</span>
<a name="l00097"></a>00097 <span class="comment">the new coder a place to start. The documentation is created using</span>
<a name="l00098"></a>00098 <span class="comment"> &lt;a href=&quot;http://www.doxygen.org&quot;&gt;Doxygen&lt;/a&gt; and, as such, has a couple</span>
<a name="l00099"></a>00099 <span class="comment">standard features (</span>
<a name="l00100"></a>00100 <span class="comment">&lt;a href=&quot;annotated.html&quot;&gt;class list&lt;/a&gt;,</span>
<a name="l00101"></a>00101 <span class="comment">&lt;a href=&quot;files.html&quot;&gt;file list&lt;/a&gt;,</span>
<a name="l00102"></a>00102 <span class="comment">&lt;a href=&quot;todo.html&quot;&gt;todo page&lt;/a&gt;). Also, class inheritance page, both in</span>
<a name="l00103"></a>00103 <span class="comment">&lt;a href=&quot;hierarchy.html&quot;&gt;text form&lt;/a&gt; and in</span>
<a name="l00104"></a>00104 <span class="comment">&lt;a href=&quot;inherits.html&quot;&gt;graphical form&lt;/a&gt;, provide and insight into the</span>
<a name="l00105"></a>00105 <span class="comment">way source code is organised. However, this page will attempt to describe</span>
<a name="l00106"></a>00106 <span class="comment">the classes based on their logical relations and intended purpose.</span>
<a name="l00107"></a>00107 <span class="comment"></span>
<a name="l00108"></a>00108 <span class="comment"></span>
<a name="l00109"></a>00109 <span class="comment">\section class_gen Generic classes</span>
<a name="l00110"></a>00110 <span class="comment">Only two related clases fell into this category right now: CC_L2D and CC_HDL2D.</span>
<a name="l00111"></a>00111 <span class="comment">These provide a simple implementation for a linked list, where CC_HDL2D is</span>
<a name="l00112"></a>00112 <span class="comment">the header that may be embedded inside other classes and CC_L2D is the class</span>
<a name="l00113"></a>00113 <span class="comment">that needs to be inherited by the classes that are to be linked. CC_HDL2D only</span>
<a name="l00114"></a>00114 <span class="comment">stores a count of items it hosts and the pointer to the first kid, while</span>
<a name="l00115"></a>00115 <span class="comment">CC_L2D stores pointers to previous nad next items; no link is made to</span>
<a name="l00116"></a>00116 <span class="comment">CC_HDL2D that hosts it, so classes need to implement links to parents themselves.</span>
<a name="l00117"></a>00117 <span class="comment"></span>
<a name="l00118"></a>00118 <span class="comment"></span>
<a name="l00119"></a>00119 <span class="comment">\section class_gui Graphical User Interface (GUI) classes</span>
<a name="l00120"></a>00120 <span class="comment">The cental widget is represented by the MainWindow class. It&#39;s functionality</span>
<a name="l00121"></a>00121 <span class="comment">is divided into modules addressing specific issues:</span>
<a name="l00122"></a>00122 <span class="comment">- Generic units</span>
<a name="l00123"></a>00123 <span class="comment">    - MW_BasicMdi is the logic unit responsible for providing common functionality</span>
<a name="l00124"></a>00124 <span class="comment">    for using Multiple Document Interface (MDI); it handles the list of visible</span>
<a name="l00125"></a>00125 <span class="comment">    docuiments available in the Windows menu and is able to get a pointer to the</span>
<a name="l00126"></a>00126 <span class="comment">    active MdiChild document.</span>
<a name="l00127"></a>00127 <span class="comment">    - MW_BasicSlots groups event handlers that are most likely to be used</span>
<a name="l00128"></a>00128 <span class="comment">    by any simple GUI application, ranging from simple file opperations (new, open,</span>
<a name="l00129"></a>00129 <span class="comment">    close) to editing opperations (cut, copy, paste, delete) to help handlers.</span>
<a name="l00130"></a>00130 <span class="comment">    - MW_RecentFiles it is able to load a previously saved list of files and to</span>
<a name="l00131"></a>00131 <span class="comment">    show it in designated menu. Also able to direct the application into loading</span>
<a name="l00132"></a>00132 <span class="comment">    a recent file.</span>
<a name="l00133"></a>00133 <span class="comment">    - MW_UiTempl encapsulates the look and feel of a GUI. Allows the user to</span>
<a name="l00134"></a>00134 <span class="comment">    change the apparence of all widgets based on predefined templates.</span>
<a name="l00135"></a>00135 <span class="comment">    - MW_StyleSheets allows to further customise of the apparence of widgets;</span>
<a name="l00136"></a>00136 <span class="comment">    this functionality is based on HTML-like</span>
<a name="l00137"></a>00137 <span class="comment">    &lt;a href=&quot;http://doc.qt.nokia.com/latest/stylesheet.html&quot;&gt;style sheets &lt;/a&gt;.</span>
<a name="l00138"></a>00138 <span class="comment">- Specific units</span>
<a name="l00139"></a>00139 <span class="comment">    - MW_SheetSlots manages signals that are intended to reach the active sheet</span>
<a name="l00140"></a>00140 <span class="comment">    or active viewport in active sheet in current MDI document.</span>
<a name="l00141"></a>00141 <span class="comment"></span>
<a name="l00142"></a>00142 <span class="comment">The panels inside MDI area are all MdiChild instances. At file level (and,</span>
<a name="l00143"></a>00143 <span class="comment">possiblly, at class level at some point in the future) the functionality is</span>
<a name="l00144"></a>00144 <span class="comment">divided in two more logical parts beside the main:</span>
<a name="l00145"></a>00145 <span class="comment">- mdic_basic.h file has functionality that gives a target to MW_BasicSlots and</span>
<a name="l00146"></a>00146 <span class="comment">is mostly related to file and edit opperations.</span>
<a name="l00147"></a>00147 <span class="comment">- mdic_viewport.h supports the use of mustiple span-able viewports and zoom and</span>
<a name="l00148"></a>00148 <span class="comment">rotation for current viewport.</span>
<a name="l00149"></a>00149 <span class="comment"></span>
<a name="l00150"></a>00150 <span class="comment"></span>
<a name="l00151"></a>00151 <span class="comment">\section sheets Sheets. Viewports.</span>
<a name="l00152"></a>00152 <span class="comment">The architecture is similar to that used in Qt, where the in-memory storage is</span>
<a name="l00153"></a>00153 <span class="comment">isolated in a separate class, with other classes being able to represent</span>
<a name="l00154"></a>00154 <span class="comment">contained data.</span>
<a name="l00155"></a>00155 <span class="comment"></span>
<a name="l00156"></a>00156 <span class="comment">ETSheet class is a logical root for all elements contained in a document. It</span>
<a name="l00157"></a>00157 <span class="comment">inherits from</span>
<a name="l00158"></a>00158 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qgraphicsscene.html&quot;&gt;QGraphicsScene&lt;/a&gt;</span>
<a name="l00159"></a>00159 <span class="comment">most of it&#39;s functionality. Exactly one ETSheet instance is associated with</span>
<a name="l00160"></a>00160 <span class="comment">a MdiChild instance.</span>
<a name="l00161"></a>00161 <span class="comment"></span>
<a name="l00162"></a>00162 <span class="comment">ETSheetView class (the viewport) is able to represent the content of an ETSheet.</span>
<a name="l00163"></a>00163 <span class="comment">It drives it&#39;s functionality from</span>
<a name="l00164"></a>00164 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qgraphicsview.html&quot;&gt;QGraphicsView&lt;/a&gt;.</span>
<a name="l00165"></a>00165 <span class="comment">Each MdiChild instance may contain one or more ETSheetView viewports, but</span>
<a name="l00166"></a>00166 <span class="comment">they will all look at the same scene.</span>
<a name="l00167"></a>00167 <span class="comment"></span>
<a name="l00168"></a>00168 <span class="comment"></span>
<a name="l00169"></a>00169 <span class="comment">\section items_subitems Items and sub-items</span>
<a name="l00170"></a>00170 <span class="comment">The items are instances of classes that inherit from</span>
<a name="l00171"></a>00171 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qgraphicsitem.html&quot;&gt;QGraphicsItem&lt;/a&gt; and</span>
<a name="l00172"></a>00172 <span class="comment">the names always start with \b ETI_.</span>
<a name="l00173"></a>00173 <span class="comment">These are hosted and managed by ETSheet class and are selectable and movable</span>
<a name="l00174"></a>00174 <span class="comment">by the user. Currently, there are two types of items:</span>
<a name="l00175"></a>00175 <span class="comment">- ETI_CplxTxt, which is a host for ETSubItem sub-items and represents a</span>
<a name="l00176"></a>00176 <span class="comment">complex text (that may be an equation or formula);</span>
<a name="l00177"></a>00177 <span class="comment">- ETI_MTxt, extending the functionality of</span>
<a name="l00178"></a>00178 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qgraphicstextitem.html&quot;&gt;QGraphicsTextItem&lt;/a&gt;</span>
<a name="l00179"></a>00179 <span class="comment">and, as such, being able to display a formatted chunk of text.</span>
<a name="l00180"></a>00180 <span class="comment"></span>
<a name="l00181"></a>00181 <span class="comment">The sub-items are instances of classes that inherit from ETSubItem and have</span>
<a name="l00182"></a>00182 <span class="comment">names that always start with \b ETSI_ . These are</span>
<a name="l00183"></a>00183 <span class="comment">hosted in an ETI_CplxTxt instance and may form a complex tree, as each sub-item</span>
<a name="l00184"></a>00184 <span class="comment">may contain another sub-items on it&#39;s turn. The types of sub-items that are</span>
<a name="l00185"></a>00185 <span class="comment">currently defined ae listed below:</span>
<a name="l00186"></a>00186 <span class="comment">- ETSI_Root: sub-item able to host a row of horizontal sub-items; this is one</span>
<a name="l00187"></a>00187 <span class="comment">of the building blocks used to create more complex sub-items</span>
<a name="l00188"></a>00188 <span class="comment">- ETSI_SText: simple sub-item capable of displayng a string; another building</span>
<a name="l00189"></a>00189 <span class="comment">block for more complex sub-items</span>
<a name="l00190"></a>00190 <span class="comment">- ETSI_Fract: sub-item displaying a fraction; consists of two ETSI_Root sub-items</span>
<a name="l00191"></a>00191 <span class="comment">- ETSI_HText: presents a central text and has six other ETSI_Root arround it</span>
<a name="l00192"></a>00192 <span class="comment">- ETSI_Integ: sub-item representing an integral</span>
<a name="l00193"></a>00193 <span class="comment">- ETSI_Lim: sub-item presenting a limit</span>
<a name="l00194"></a>00194 <span class="comment">- ETSI_LogicAc: sub-item able to display a logical if-elseif-else component</span>
<a name="l00195"></a>00195 <span class="comment">- ETSI_Matrix: sub-item presenting a matrix or a determinant</span>
<a name="l00196"></a>00196 <span class="comment">- ETSI_Radic: sub-item that will display a radical</span>
<a name="l00197"></a>00197 <span class="comment">- ETSI_Sum: sub-item that will display a sum</span>
<a name="l00198"></a>00198 <span class="comment"></span>
<a name="l00199"></a>00199 <span class="comment"></span>
<a name="l00200"></a>00200 <span class="comment">\section vp_commands    Viewport commands</span>
<a name="l00201"></a>00201 <span class="comment">Each view is able to maintain a command independent of other views.</span>
<a name="l00202"></a>00202 <span class="comment">Having multiple views looking at a single scene means that there may</span>
<a name="l00203"></a>00203 <span class="comment">be multiple commands running against same scene.</span>
<a name="l00204"></a>00204 <span class="comment"></span>
<a name="l00205"></a>00205 <span class="comment">Commands are instances of classes that inherit from ETVpCommand and, basically,</span>
<a name="l00206"></a>00206 <span class="comment">require the caller to create an instance of the command, initialise the options,</span>
<a name="l00207"></a>00207 <span class="comment">and pass the instance to ETSheetView::startCommand().</span>
<a name="l00208"></a>00208 <span class="comment"></span>
<a name="l00209"></a>00209 <span class="comment">Following commands are defined so far:</span>
<a name="l00210"></a>00210 <span class="comment">- ETVpCmd_EditSubI: starts the editing of an sub-item</span>
<a name="l00211"></a>00211 <span class="comment">- ETVpCmd_NewSubI: creates a new sub-item</span>
<a name="l00212"></a>00212 <span class="comment">- ETVpCmd_NewTopElem: creates a new item</span>
<a name="l00213"></a>00213 <span class="comment"></span>
<a name="l00214"></a>00214 <span class="comment"></span>
<a name="l00215"></a>00215 <span class="comment">\section undo_redo  Undo and redo</span>
<a name="l00216"></a>00216 <span class="comment">This functionality is implemented at sheet level, meaning that all sheets</span>
<a name="l00217"></a>00217 <span class="comment">have the ability to keep a chain of changes independent of other sheets that may</span>
<a name="l00218"></a>00218 <span class="comment">be opened at the same time.</span>
<a name="l00219"></a>00219 <span class="comment"></span>
<a name="l00220"></a>00220 <span class="comment">The class that implements the interface used by other components is</span>
<a name="l00221"></a>00221 <span class="comment">ETUndoHead and an instance is embedded in each ETSheet. Undo and redo</span>
<a name="l00222"></a>00222 <span class="comment">opperations are all chained in a single row, with a pointer walking the chain</span>
<a name="l00223"></a>00223 <span class="comment">according to the commands it recieves.</span>
<a name="l00224"></a>00224 <span class="comment"></span>
<a name="l00225"></a>00225 <span class="comment">Each unitary opperation is an instance of a class that inherits from ETUndoElem.</span>
<a name="l00226"></a>00226 <span class="comment">This abstract class provides the means to access the instances and send them</span>
<a name="l00227"></a>00227 <span class="comment">undo / redo commands independent of the underlying opperation.</span>
<a name="l00228"></a>00228 <span class="comment"></span>
<a name="l00229"></a>00229 <span class="comment"></span>
<a name="l00230"></a>00230 <span class="comment">\section save_load  Saving and loading to / from file</span>
<a name="l00231"></a>00231 <span class="comment">There is no separate class that does this opperations. Instead, the</span>
<a name="l00232"></a>00232 <span class="comment">functionality is embedded inside ETSheet via ETSheet::saveXMLFile() and</span>
<a name="l00233"></a>00233 <span class="comment">ETSheet::loadXMLFile(). As the name implies the XML format is used in</span>
<a name="l00234"></a>00234 <span class="comment">saving / loading the file and</span>
<a name="l00235"></a>00235 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qtxml.html&quot;&gt;QtXml Module&lt;/a&gt;</span>
<a name="l00236"></a>00236 <span class="comment">is used to accomplish the tasks.</span>
<a name="l00237"></a>00237 <span class="comment"></span>
<a name="l00238"></a>00238 <span class="comment">The format of the file that is saved follows the guidance in</span>
<a name="l00239"></a>00239 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/source/browse/trunk/doc/example.xml&quot;&gt;</span>
<a name="l00240"></a>00240 <span class="comment">example.xml&lt;/a&gt; that is located in</span>
<a name="l00241"></a>00241 <span class="comment">&lt;a href=&quot;https://code.google.com/p/equtemper/source/browse/trunk/doc&quot;&gt;doc&lt;/a&gt;</span>
<a name="l00242"></a>00242 <span class="comment">subfolder.</span>
<a name="l00243"></a>00243 <span class="comment"></span>
<a name="l00244"></a>00244 <span class="comment">@todo current implementation does not check for a version. Do that.</span>
<a name="l00245"></a>00245 <span class="comment"></span>
<a name="l00246"></a>00246 <span class="comment">&lt;hr&gt;</span>
<a name="l00247"></a>00247 <span class="comment">Step to next page: \ref future_plans &quot;things that need to be done.&quot; or go to</span>
<a name="l00248"></a>00248 <span class="comment">previous page: &lt;a href=&quot;index.html&quot;&gt;documentation home&lt;/a&gt;</span>
<a name="l00249"></a>00249 <span class="comment"></span>
<a name="l00250"></a>00250 <span class="comment"></span>
<a name="l00251"></a>00251 <span class="comment"></span>
<a name="l00252"></a>00252 <span class="comment"></span>
<a name="l00253"></a>00253 <span class="comment">\page future_plans Things to be implemented</span>
<a name="l00254"></a>00254 <span class="comment"></span>
<a name="l00255"></a>00255 <span class="comment">This page lists the things that need to be done and that have no othaer place</span>
<a name="l00256"></a>00256 <span class="comment">to live in. The &lt;a href=&quot;todo.html&quot;&gt;todo page&lt;/a&gt;) lists things to be</span>
<a name="l00257"></a>00257 <span class="comment">implemented that already have a defined place.</span>
<a name="l00258"></a>00258 <span class="comment"></span>
<a name="l00259"></a>00259 <span class="comment"></span>
<a name="l00260"></a>00260 <span class="comment">\section sect_calc_eng  Computational engine</span>
<a name="l00261"></a>00261 <span class="comment">A way to evaluate the values and to highlite the parts that can&#39;t be evaluated.</span>
<a name="l00262"></a>00262 <span class="comment">Default flow of execution marked with arrows that the user may edit.</span>
<a name="l00263"></a>00263 <span class="comment"></span>
<a name="l00264"></a>00264 <span class="comment"></span>
<a name="l00265"></a>00265 <span class="comment">\section sect_find_replace  Search and replace</span>
<a name="l00266"></a>00266 <span class="comment">Name said it all. Tied with the \ref sect_var_high &quot;highlite section&quot;.</span>
<a name="l00267"></a>00267 <span class="comment"></span>
<a name="l00268"></a>00268 <span class="comment"></span>
<a name="l00269"></a>00269 <span class="comment">\section sect_var_high  Names highlite</span>
<a name="l00270"></a>00270 <span class="comment">Highlite the name of:</span>
<a name="l00271"></a>00271 <span class="comment">- the variable under the mouse on mouse move</span>
<a name="l00272"></a>00272 <span class="comment">- choosen variable during comman</span>
<a name="l00273"></a>00273 <span class="comment">inside entire sheet. Navigate to previous / next occurence.</span>
<a name="l00274"></a>00274 <span class="comment"></span>
<a name="l00275"></a>00275 <span class="comment">The highlite must be viewport based, so that highliting an expression in a</span>
<a name="l00276"></a>00276 <span class="comment">viewport does not show it highlited in another.</span>
<a name="l00277"></a>00277 <span class="comment"></span>
<a name="l00278"></a>00278 <span class="comment"></span>
<a name="l00279"></a>00279 <span class="comment">\section sect_parser    Parser</span>
<a name="l00280"></a>00280 <span class="comment">The parser needs to be able to parse:</span>
<a name="l00281"></a>00281 <span class="comment">- c/c++ expressions</span>
<a name="l00282"></a>00282 <span class="comment">- tex expressions</span>
<a name="l00283"></a>00283 <span class="comment">- what else?</span>
<a name="l00284"></a>00284 <span class="comment"></span>
<a name="l00285"></a>00285 <span class="comment">To support the interaction with the parser, the user shall be presented with a</span>
<a name="l00286"></a>00286 <span class="comment">text box embedded in the viewport / outside of it where it may type the entire</span>
<a name="l00287"></a>00287 <span class="comment">text without being disturbed by constant re-arranging that occurs inmain editor.</span>
<a name="l00288"></a>00288 <span class="comment">This may be presented as an option to replace the default behaviour and as a</span>
<a name="l00289"></a>00289 <span class="comment">separate command.</span>
<a name="l00290"></a>00290 <span class="comment"></span>
<a name="l00291"></a>00291 <span class="comment"></span>
<a name="l00292"></a>00292 <span class="comment">\section sect_Viewports Viewports</span>
<a name="l00293"></a>00293 <span class="comment">Highlite the current viewport inside MdiChild</span>
<a name="l00294"></a>00294 <span class="comment"></span>
<a name="l00295"></a>00295 <span class="comment"></span>
<a name="l00296"></a>00296 <span class="comment">\section sect_imports   Imports</span>
<a name="l00297"></a>00297 <span class="comment">Place import statement (visible or not, according to user&#39;s choice) that</span>
<a name="l00298"></a>00298 <span class="comment">inherit a set of formulas. Create online repository.</span>
<a name="l00299"></a>00299 <span class="comment"></span>
<a name="l00300"></a>00300 <span class="comment"></span>
<a name="l00301"></a>00301 <span class="comment">\section sect_docum List of functions / variables. Documentation</span>
<a name="l00302"></a>00302 <span class="comment">A pop-up / docked panel shall present the list of known tokens (from all</span>
<a name="l00303"></a>00303 <span class="comment">imported sheets  or only from this one) grouped in various ways and present:</span>
<a name="l00304"></a>00304 <span class="comment">- icons / color codes to tell the type of the token</span>
<a name="l00305"></a>00305 <span class="comment">- the sheet where they originated.</span>
<a name="l00306"></a>00306 <span class="comment"></span>
<a name="l00307"></a>00307 <span class="comment">Optionally, the occurences may be highlited when a list entry is selected.</span>
<a name="l00308"></a>00308 <span class="comment"></span>
<a name="l00309"></a>00309 <span class="comment">Each token may have an associated description. A popup / docked window may</span>
<a name="l00310"></a>00310 <span class="comment">track the mouse or the selection and display the brief documentation for that</span>
<a name="l00311"></a>00311 <span class="comment">token. Extensive documentation / links to wikipedia pages need to have their</span>
<a name="l00312"></a>00312 <span class="comment">own browser, perhaps in MDI area. Options should enable the user to open links</span>
<a name="l00313"></a>00313 <span class="comment">in it&#39;s default browser.</span>
<a name="l00314"></a>00314 <span class="comment"></span>
<a name="l00315"></a>00315 <span class="comment"></span>
<a name="l00316"></a>00316 <span class="comment">\section sect_plugins   Plug-ins. Scripting.</span>
<a name="l00317"></a>00317 <span class="comment">It is vital to let the advanced user use extended capabilities. This may be</span>
<a name="l00318"></a>00318 <span class="comment">accomplished using a plug-in system based on dynamic loading of the libraries</span>
<a name="l00319"></a>00319 <span class="comment">and (at least) a scripting system.</span>
<a name="l00320"></a>00320 <span class="comment"></span>
<a name="l00321"></a>00321 <span class="comment"></span>
<a name="l00322"></a>00322 <span class="comment">\section sect_items     Items</span>
<a name="l00323"></a>00323 <span class="comment">Using flexible interface provided by the</span>
<a name="l00324"></a>00324 <span class="comment">&lt;a href=&quot;http://doc.qt.nokia.com/latest/qgraphicsscene.html&gt;QGraphicsScene&lt;/a&gt;</span>
<a name="l00325"></a>00325 <span class="comment">a large variety of items may be created inside the sheet. Underlying</span>
<a name="l00326"></a>00326 <span class="comment">engine is OpenGL, so 2D drawing capabilities are at fingertips. Elements</span>
<a name="l00327"></a>00327 <span class="comment">like charts, animations, ... have to be implemented.</span>
<a name="l00328"></a>00328 <span class="comment"></span>
<a name="l00329"></a>00329 <span class="comment"></span>
<a name="l00330"></a>00330 <span class="comment">\section sect_various       Various</span>
<a name="l00331"></a>00331 <span class="comment"></span>
<a name="l00332"></a>00332 <span class="comment">- be able to display sub-Items with different settings</span>
<a name="l00333"></a>00333 <span class="comment">- simple / fancy display of graphics (image / line)</span>
<a name="l00334"></a>00334 <span class="comment">- text more read-able</span>
<a name="l00335"></a>00335 <span class="comment">- toolbar for apparence (font color background)</span>
<a name="l00336"></a>00336 <span class="comment">- window to show only current sub-item or item</span>
<a name="l00337"></a>00337 <span class="comment">- user un create sub-items</span>
<a name="l00338"></a>00338 <span class="comment">- scale individual elements</span>
<a name="l00339"></a>00339 <span class="comment">- clear formatting and autoadjust sizes</span>
<a name="l00340"></a>00340 <span class="comment">- printing</span>
<a name="l00341"></a>00341 <span class="comment">- cut copy paste xml based</span>
<a name="l00342"></a>00342 <span class="comment">- undo and redo</span>
<a name="l00343"></a>00343 <span class="comment">- user settings for all things</span>
<a name="l00344"></a>00344 <span class="comment">- draw order (front back front before after)</span>
<a name="l00345"></a>00345 <span class="comment">- decorated text; toolbar</span>
<a name="l00346"></a>00346 <span class="comment">- images as items</span>
<a name="l00347"></a>00347 <span class="comment">- convert to/from other notations (latex web)</span>
<a name="l00348"></a>00348 <span class="comment">- settings for wheel (zoom scroll)</span>
<a name="l00349"></a>00349 <span class="comment">- copy / save as image</span>
<a name="l00350"></a>00350 <span class="comment">- plug-ins; script as plug-in</span>
<a name="l00351"></a>00351 <span class="comment"></span>
<a name="l00352"></a>00352 <span class="comment"></span>
<a name="l00353"></a>00353 <span class="comment"></span>
<a name="l00354"></a>00354 <span class="comment">&lt;hr&gt;</span>
<a name="l00355"></a>00355 <span class="comment">Step to next page: &lt;a href=&quot;hierarchy.html&quot;&gt;class herarchy&lt;/a&gt; or go to</span>
<a name="l00356"></a>00356 <span class="comment">previous page: \ref sp_src_idx &quot;An overview of the sourcecode&quot;</span>
<a name="l00357"></a>00357 <span class="comment"></span>
<a name="l00358"></a>00358 <span class="comment"></span>
<a name="l00359"></a>00359 <span class="comment"></span>
<a name="l00360"></a>00360 <span class="comment"></span>
<a name="l00361"></a>00361 <span class="comment">*/</span>
<a name="l00362"></a>00362 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00363"></a>00363 <span class="comment">/* ========================================================================= */</span>
<a name="l00364"></a>00364 <span class="preprocessor">#ifndef __MAIN_INC__</span>
<a name="l00365"></a>00365 <span class="preprocessor"></span><span class="preprocessor">#define __MAIN_INC__</span>
<a name="l00366"></a>00366 <span class="preprocessor"></span><span class="comment">//</span>
<a name="l00367"></a>00367 <span class="comment">//</span>
<a name="l00368"></a>00368 <span class="comment">//</span>
<a name="l00369"></a>00369 <span class="comment">//</span>
<a name="l00370"></a>00370 <span class="comment">/*  INCLUDES    ------------------------------------------------------------ */</span>
<a name="l00371"></a>00371 
<a name="l00372"></a>00372 <span class="comment">/*  INCLUDES    ============================================================ */</span>
<a name="l00373"></a>00373 <span class="comment">//</span>
<a name="l00374"></a>00374 <span class="comment">//</span>
<a name="l00375"></a>00375 <span class="comment">//</span>
<a name="l00376"></a>00376 <span class="comment">//</span>
<a name="l00377"></a>00377 <span class="comment">/*  DEFINITIONS    --------------------------------------------------------- */</span>
<a name="l00378"></a>00378 
<a name="l00379"></a>00379 <span class="keyword">class       </span><a class="code" href="class_main_window.html" title="form that represents main GUI component">MainWindow</a>;
<a name="l00380"></a>00380 <span class="keyword">class       </span>QNetworkAccessManager;
<a name="l00381"></a>00381 <span class="keyword">class       </span>QTimer;
<a name="l00382"></a>00382 <span class="keyword">class       </span>QNetworkDiskCache;
<a name="l00383"></a>00383 <span class="comment"></span>
<a name="l00384"></a>00384 <span class="comment">/// the name of the application as a string</span>
<a name="l00385"></a><a class="code" href="main_8h.html#af0b5cfa4242ae7f98ba80fd23ef8afa9">00385</a> <span class="comment"></span><span class="preprocessor">#define     APP_NAME                &quot;equtemper&quot;</span>
<a name="l00386"></a>00386 <span class="preprocessor"></span>
<a name="l00387"></a>00387 <span class="comment">/* uncomment following line to use QMutex instead of QReadWriteLock */</span>
<a name="l00388"></a>00388 <span class="comment">// #define PREFER_MUTEXES      1</span>
<a name="l00389"></a>00389 
<a name="l00390"></a>00390 <span class="comment">/* uncomment following line to trace execution (output text to indicate code flow) */</span>
<a name="l00391"></a><a class="code" href="main_8h.html#a3a742228d11c3635ea3f581145e65f76">00391</a> <span class="preprocessor">#define     FOLLOW_EXECUTION     1</span>
<a name="l00392"></a>00392 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00393"></a>00393 <span class="comment">/// default time between two consecutive requests for pages</span>
<a name="l00394"></a><a class="code" href="main_8h.html#a4cabc01f9ae0af427371f9fd3f83ca84">00394</a> <span class="comment"></span><span class="preprocessor">#define     DEFAULT_SEARCH_INTERVAL     10000</span>
<a name="l00395"></a>00395 <span class="preprocessor"></span>
<a name="l00396"></a>00396 <span class="comment">/* uncomment this to enable application wide debug features */</span>
<a name="l00397"></a><a class="code" href="main_8h.html#aa4c4cd128eb7cfdf636a1558efb29106">00397</a> <span class="preprocessor">#define     APP_DEBUG           1</span>
<a name="l00398"></a>00398 <span class="preprocessor"></span>
<a name="l00399"></a>00399 <span class="comment"></span>
<a name="l00400"></a>00400 <span class="comment">/// set to 1 to include dynamic debugger helper code; set to 0 to disable</span>
<a name="l00401"></a><a class="code" href="main_8h.html#a418526e7721d29f6b97995170695e65a">00401</a> <span class="comment"></span><span class="preprocessor">#define     ENABLE_DDHC         0</span>
<a name="l00402"></a>00402 <span class="preprocessor"></span>
<a name="l00403"></a>00403 
<a name="l00404"></a>00404 
<a name="l00405"></a>00405 
<a name="l00406"></a>00406 <span class="preprocessor">#ifdef  FOLLOW_EXECUTION</span>
<a name="l00407"></a><a class="code" href="main_8h.html#a31c881923d495638e082cae339a523b5">00407</a> <span class="preprocessor"></span><span class="preprocessor">#define TRACE_EXECUTION(a,b,c)     qDebug() &lt;&lt; __FUNCTION__ &lt;&lt; &quot;: &quot; &lt;&lt; a &lt;&lt; b &lt;&lt; c</span>
<a name="l00408"></a>00408 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00409"></a>00409 <span class="preprocessor"></span><span class="preprocessor">#define TRACE_EXECUTION(a,b,c)</span>
<a name="l00410"></a>00410 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00411"></a>00411 <span class="preprocessor"></span>
<a name="l00412"></a>00412 
<a name="l00413"></a>00413 <span class="comment">/* for each bug that is traced a specific name should be used; this way, when</span>
<a name="l00414"></a>00414 <span class="comment">the bug is finnaly removed, the verbrose debug messages may be</span>
<a name="l00415"></a>00415 <span class="comment">removed from code */</span>
<a name="l00416"></a>00416 <span class="comment">// #define      SPECIFIC_BUG    qDebug() &lt;&lt; __FUNCTION__ &lt;&lt;</span>
<a name="l00417"></a><a class="code" href="main_8h.html#a2fb92e95e9bd37461409b33016829761">00417</a> <span class="preprocessor">#define     LIST_BUG    qDebug() &lt;&lt; __FUNCTION__ &lt;&lt;</span>
<a name="l00418"></a>00418 <span class="preprocessor"></span>
<a name="l00419"></a>00419 
<a name="l00420"></a>00420 
<a name="l00421"></a>00421 
<a name="l00422"></a>00422 
<a name="l00423"></a>00423 
<a name="l00424"></a>00424 
<a name="l00425"></a>00425 
<a name="l00426"></a>00426 
<a name="l00427"></a>00427 <span class="comment">/*  DEFINITIONS    ========================================================= */</span>
<a name="l00428"></a>00428 <span class="comment">//</span>
<a name="l00429"></a>00429 <span class="comment">//</span>
<a name="l00430"></a>00430 <span class="comment">//</span>
<a name="l00431"></a>00431 <span class="comment">//</span>
<a name="l00432"></a>00432 <span class="comment">/*  DATA    ---------------------------------------------------------------- */</span>
<a name="l00433"></a>00433 <span class="comment"></span>
<a name="l00434"></a>00434 <span class="comment">/// hold pointer to main gui object in global variable for easy access</span>
<a name="l00435"></a>00435 <span class="comment"></span><span class="keyword">extern</span>      <a class="code" href="class_main_window.html" title="form that represents main GUI component">MainWindow</a> *                <a class="code" href="main_8cc.html#ac217449d3d899f76481b08cf3cc9acc0" title="hold pointer to main gui object in global variable for easy access">g_MW</a>;
<a name="l00436"></a>00436 <span class="keyword">extern</span>      QNetworkAccessManager *     <a class="code" href="main_8cc.html#a45c078eae1cb8815b0118ff3a0fe17b4">l_manager</a> ;
<a name="l00437"></a>00437 <span class="keyword">extern</span>      QTimer *                    <a class="code" href="main_8cc.html#a4398435139e585768c90e9cf2ffd7037">app_timer</a>;
<a name="l00438"></a>00438 <span class="keyword">extern</span>      QNetworkDiskCache *         <a class="code" href="main_8cc.html#a2ac44f2e0fc3c6d5ed27952a0fd6563d">main_cache</a> ;
<a name="l00439"></a>00439 
<a name="l00440"></a>00440 <span class="comment">/*  DATA    ================================================================ */</span>
<a name="l00441"></a>00441 <span class="comment">//</span>
<a name="l00442"></a>00442 <span class="comment">//</span>
<a name="l00443"></a>00443 <span class="comment">//</span>
<a name="l00444"></a>00444 <span class="comment">//</span>
<a name="l00445"></a>00445 <span class="comment">/*  FUNCTIONS    ----------------------------------------------------------- */</span>
<a name="l00446"></a>00446 
<a name="l00447"></a>00447 
<a name="l00448"></a>00448 <span class="comment">/*  FUNCTIONS    =========================================================== */</span>
<a name="l00449"></a>00449 <span class="comment">//</span>
<a name="l00450"></a>00450 <span class="comment">//</span>
<a name="l00451"></a>00451 <span class="comment">//</span>
<a name="l00452"></a>00452 <span class="comment">//</span>
<a name="l00453"></a>00453 
<a name="l00454"></a>00454 <span class="preprocessor">#include    &lt;<a class="code" href="ddhc__main_8h.html" title="Groups all definitions related to dinamic debug helper code.">debug/ddhc_main.h</a>&gt;</span>
<a name="l00455"></a>00455 
<a name="l00456"></a>00456 <span class="preprocessor">#endif // __MAIN_INC__</span>
<a name="l00457"></a>00457 <span class="preprocessor"></span><span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00458"></a>00458 <span class="comment">/* ========================================================================= */</span>
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